For bathrooms/laundry rooms, bedrooms, closets, cabinets, offices/supply closets, gym lockers, storage spaces and stored boats/RVs/classic cars. Removes excess moisture from air. Eliminates musty odors and reduce allergens caused by moisture. Prevents mold and mildew stains, protects against moisture damage and turns stagnant air into fresher, cleaner air. Can be refilled and reused time and again. For space that is 150 to 250 sq-ft.